10442012021 has 4 divisors (see below), whose sum is σ = 11933728032. Its totient is φ = 8950296012.

The previous prime is 10442011999. The next prime is 10442012047. The reversal of 10442012021 is 12021024401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12021024401 = 43 ⋅279558707.

It is not a de Polignac number, because 10442012021 - 2²² = 10437817717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10442062021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745857995 + ... + 745858008.

It is an arithmetic number, because the mean of its divisors is an integer number (2983432008).

Almost surely, 2^10442012021 is an apocalyptic number.

It is an amenable number.

10442012021 is a deficient number, since it is larger than the sum of its proper divisors (1491716011).

10442012021 is an equidigital number, since it uses as much as digits as its factorization.

10442012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491716010.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 10442012021 its reverse (12021024401), we get a palindrome (22463036422).

The spelling of 10442012021 in words is "ten billion, four hundred forty-two million, twelve thousand, twenty-one".